Given an input character string (e.g. '1001'), return a character string with the bits flipped ('0110').
The test suite does not check that the solution is a character string, but the problem definition requires that it should.
Added this check. (I messed it up a bit the first time I tried to do it, so sorry for some interim weirdness.)
str = num2str(A,formatSpec), could replace '
Invalid solution, really
New test suite invalidates this solution.
Project Euler: Problem 7, Nth prime
299 Solvers
First non-zero element in each column
419 Solvers
Matrix indexing with two vectors of indices
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Duplicate each element of a vector.
434 Solvers
115 Solvers